Sign-value notation: Difference between revisions

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== Subtractive notation ==

{{see also|Roman numerals#Subtractive notation}}

'''Subtractive notation'''<!--boldface per [[WP:R#PLA]]--> represents numbers by a series of numerals in which signs representing smaller values are typically subtracted from those representing larger values to equal the number represented. In Roman numerals, for example, {{rn|I}} means one and {{rn|X}} means ten. Hence {{rn|IX}} means nine (10&nbsp;−&nbsp;1). The consistent use of the subtractive system with Roman numerals was not standardised until after the widespread adoption of the [[printing press]] in Europe.{{sfnp|Daniels|Bright|1996|p=796}}